/* ==================================================
               Mehdi Dimyadi Portfolio
   ================================================== */
  
/* ---------- Gradient colors (compatible with dark/light themes) ---------- */
:root {
    --g1: #60a5fa;
    --g2: #a78bfa;
    --g3: #f472b6;
    --spot: rgba(96, 165, 250, .22);
    --ease: cubic-bezier(.2, .8, .2, 1);
}
body.light {
    --g1: #0284c7;
    --g2: #6366f1;
    --g3: #db2777;
    --spot: rgba(2, 132, 199, .16);
}

html { scroll-behavior: smooth; }

/* ---------- Aurora Background ---------- */
.aurora {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.aurora span {
    position: absolute;
    width: 50vmax;
    height: 50vmax;
    border-radius: 50%;
    filter: blur(90px);
    opacity: .28;
    animation: auroraFloat 24s ease-in-out infinite alternate;
}
.aurora span:nth-child(1) { background: var(--g1); top: -15%; inset-inline-end: -10%; }
.aurora span:nth-child(2) { background: var(--g2); bottom: -20%; inset-inline-start: -12%; animation-duration: 30s; }
.aurora span:nth-child(3) { background: var(--g3); top: 40%; left: 35%; width: 32vmax; height: 32vmax; opacity: .14; animation-duration: 36s; }
body.light .aurora span { opacity: .22; }
@keyframes auroraFloat {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to   { transform: translate3d(6vw, -7vh, 0) scale(1.18); }
}

/* ---------- Scroll Progress Bar ---------- */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 100%;
    transform: scaleX(0);
    transform-origin: left;
    z-index: 200;
    background: linear-gradient(90deg, var(--g1), var(--g2), var(--g3));
    box-shadow: 0 0 10px var(--g2);
    pointer-events: none;
}
body[dir="rtl"] #scroll-progress { left: auto; right: 0; transform-origin: right; }

/* ---------- Mouse-following light (desktop only) ---------- */
#cursor-glow {
    position: fixed;
    left: 0;
    top: 0;
    width: 420px;
    height: 420px;
    margin: -210px 0 0 -210px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(circle, var(--spot), transparent 65%);
    will-change: transform;
}
@media (hover: none) { #cursor-glow { display: none; } }

/* ---------- هدر ---------- */
header {
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    border-bottom: 1px solid var(--border-color);
}
#logo {
    font-size: 1.5rem;
    background: linear-gradient(90deg, var(--g1), var(--g2), var(--g3), var(--g1));
    background-size: 300% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradientFlow 8s linear infinite;
}
@keyframes gradientFlow { to { background-position: 300% 0; } }

.nav-link.active { color: var(--accent-color); }
.nav-link.active::after { transform: translateX(-50%) scaleX(1); }
.nav-link:focus-visible,
.scroll-down:focus-visible,
button:focus-visible {
    outline: 2px solid var(--g2);
    outline-offset: 3px;
    border-radius: 8px;
}

/* ---------- Hero ---------- */
#hero { overflow: hidden; }
#hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}
#hero-title {
    background: linear-gradient(90deg, #fff 0%, var(--g1) 30%, var(--g3) 60%, #fff 100%);
    background-size: 250% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradientFlow 7s linear infinite;
    text-shadow: none;
}
body.light #hero-title {
    background-image: linear-gradient(90deg, #0f172a 0%, var(--g2) 40%, var(--g3) 70%, #0f172a 100%);
}

/* Rotating gradient ring around the avatar */
.avatar-wrapper { isolation: isolate; }
.avatar-wrapper::before {
    content: "";
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    z-index: -1;
    background: conic-gradient(from 0deg, var(--g1), var(--g2), var(--g3), var(--g1));
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 4px));
    mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 4px));
    animation: spin 6s linear infinite;
    filter: drop-shadow(0 0 10px var(--g2));
}
.avatar-wrapper::after {
    content: "";
    position: absolute;
    inset: -30px;
    border-radius: 50%;
    z-index: -2;
    background: radial-gradient(circle, var(--avatar-glow-alt), transparent 65%);
    opacity: .55;
    animation: pulse 4s ease-in-out infinite;
}
@keyframes spin  { to { transform: rotate(360deg); } }
@keyframes pulse { 50% { transform: scale(1.12); opacity: .85; } }
#hero-avatar { animation: bob 6s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-8px); } }
#hero-avatar:hover { animation-play-state: paused; }

#hero-subtitle {
    padding: 1rem 1.2rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
}

.scroll-down {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, .06);
    backdrop-filter: blur(6px);
    color: var(--text-color);
}
.scroll-down:hover { text-decoration: none; border-color: var(--g1); }

/* ---------- Section Titles ---------- */
.section-title {
    background: linear-gradient(90deg, var(--g1), var(--g2), var(--g3), var(--g1));
    background-size: 300% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradientFlow 8s linear infinite;
    padding-bottom: .2rem;
}
.section-title::after {
    content: "";
    display: block;
    height: 4px;
    width: 0;
    margin: .6rem auto 0;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--g1), var(--g3));
    transition: width .9s var(--ease);
}
.section-title.in-view::after { width: 70px; }

/* ---------- Cards: Glass + Mouse Light + Gradient Border ---------- */
.skill-card, .project-card, .experience-card {
    position: relative;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transform-style: preserve-3d;
    will-change: transform;
}
.skill-card::before, .project-card::before, .experience-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    opacity: 0;
    transition: opacity .35s;
    background: radial-gradient(380px circle at var(--mx, 50%) var(--my, 50%), var(--spot), transparent 55%);
}
.skill-card:hover::before, .project-card:hover::before, .experience-card:hover::before { opacity: 1; }

.skill-card::after, .project-card::after, .experience-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    pointer-events: none;
    opacity: 0;
    transition: opacity .35s;
    background: linear-gradient(135deg, var(--g1), var(--g2), var(--g3));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
}
.skill-card:hover::after, .project-card:hover::after, .experience-card:hover::after { opacity: 1; }

/* Faster transition during tilt for a natural feel */
.tilting { transition: transform .08s linear, box-shadow .3s, border-color .3s !important; }

/* ---------- Reveal on Scroll ---------- */
.reveal { opacity: 0; }
.reveal.in-view { opacity: 1; animation: revealUp .85s var(--ease) var(--d, 0ms) backwards; }
@keyframes revealUp {
    from { opacity: 0; transform: translate(var(--rx, 0), 40px) scale(.96); }
    to   { opacity: 1; transform: none; }
}

/* ---------- Skills ---------- */
.skill-card i { animation: iconFloat 4s ease-in-out infinite; }
.skill-card:nth-child(even) i { animation-delay: -2s; }
@keyframes iconFloat { 50% { transform: translateY(-5px); } }
.skill-card:hover i { animation-play-state: paused; }

.skill-bar-container {
    height: 14px;
    border: 1px solid var(--border-color);
    background: rgba(148, 163, 184, .15);
}
.skill-bar-fill {
    position: relative;
    background: linear-gradient(90deg, var(--g1), var(--g2), var(--g3));
    box-shadow: 0 0 12px var(--g2);
    overflow: hidden;
    transition: none;
}
.skill-bar-fill::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, .45) 50%, transparent 70%);
    transform: translateX(-100%);
    animation: shimmer 2.4s ease-in-out infinite;
}
@keyframes shimmer { to { transform: translateX(100%); } }
.skill-percent { font-size: .7rem; }

/* ---------- Projects ---------- */
.project-slider img {
    transition: opacity .8s ease, transform 7s ease-out;
    transform: scale(1);
}
.project-slider img.opacity-100 { transform: scale(1.1); }
.project-card:hover .project-slider { box-shadow: 0 10px 30px rgba(0, 0, 0, .35); }
.project-card:hover .project-slider img.opacity-100 { transform: scale(1.18); }
.project-slider::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(to top, rgba(0, 0, 0, .35), transparent 50%);
}
.project-card button {
    background: linear-gradient(135deg, var(--g1), var(--g2));
    color: #fff;
    box-shadow: 0 4px 14px var(--shadow-color);
    margin-inline-end: .4rem;
}
.project-card button:hover {
    background: linear-gradient(135deg, var(--g2), var(--g3));
    color: #fff;
    transform: translateY(-3px) scale(1.12);
}

/* ---------- Experiences ---------- */
.experience-icon { background: linear-gradient(135deg, rgba(96, 165, 250, .18), rgba(167, 139, 250, .06)); }
.experience-icon i {
    background: linear-gradient(135deg, var(--g1), var(--g3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ---------- Footer ---------- */
footer { position: relative; }
footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 8%;
    right: 8%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--g1), var(--g3), transparent);
    background-size: 200% 100%;
    animation: gradientFlow 6s linear infinite;
}
.social-links a:hover { background: linear-gradient(135deg, var(--g1), var(--g3)); color: #fff; transform: translateY(-4px) scale(1.1); }

/* ---------- Back-to-top button ---------- */
#back-to-top {
    position: fixed;
    bottom: 22px;
    inset-inline-end: 22px;
    z-index: 90;
    width: 46px;
    height: 46px;
    font-size: 1.1rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #fff;
    background: linear-gradient(135deg, var(--g1), var(--g2));
    box-shadow: 0 8px 20px var(--shadow-color);
    opacity: 0;
    transform: translateY(20px) scale(.8);
    pointer-events: none;
    transition: opacity .3s, transform .3s var(--ease);
}
#back-to-top.show { opacity: 1; transform: none; pointer-events: auto; }
#back-to-top:hover { background: linear-gradient(135deg, var(--g2), var(--g3)); color: #fff; }

/* ---------- Theme change animation (circle expanding from the button's position) ---------- */
::view-transition-old(root), ::view-transition-new(root) {
    animation: none;
    mix-blend-mode: normal;
}
::view-transition-new(root) { z-index: 9999; }
::view-transition-old(root) { z-index: 1; }


/* ==================================================
   Role titles (typed effect) below the name
================================================== */
.hero-roles {
    min-height: 1.9em;
    margin-top: -.4rem;
    font-size: clamp(1rem, 2.6vw, 1.3rem);
    font-weight: 500;
    color: var(--text-color);
    opacity: .92;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .25rem;
    flex-wrap: wrap;
}
#role-text {
    background: linear-gradient(90deg, var(--g1), var(--g3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-roles .caret {
    display: inline-block;
    width: 2px;
    height: 1.15em;
    background: var(--g1);
    animation: caretBlink 1s steps(1) infinite;
}
@keyframes caretBlink { 50% { opacity: 0; } }

/* ==================================================
   Project Filters
================================================== */
#projects-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .6rem;
    max-width: 1280px;
    margin: 0 auto 1.6rem;
    padding: 0 1rem;
}
.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-color);
    font: inherit;
    font-size: .95rem;
    backdrop-filter: blur(8px);
    transition: transform .25s var(--ease), background .25s, border-color .25s, box-shadow .25s;
}
.filter-chip .count {
    min-width: 1.5em;
    padding: .05em .5em;
    border-radius: 999px;
    font-size: .78rem;
    background: rgba(148, 163, 184, .22);
}
.filter-chip:hover { transform: translateY(-2px); border-color: var(--g1); }
.filter-chip.active {
    color: #fff;
    border-color: transparent;
    background: linear-gradient(135deg, var(--g1), var(--g2));
    box-shadow: 0 6px 18px var(--shadow-color);
}
.filter-chip.active .count { background: rgba(255, 255, 255, .25); }

.project-card.is-filtered { display: none; }
.project-card.pop { animation: pop .5s var(--ease) both; }
@keyframes pop { from { opacity: 0; transform: scale(.92) translateY(14px); } to { opacity: 1; transform: none; } }

/* ---------- Category badge, "Coming Soon," and slider dots ---------- */
.proj-badge, .proj-soon {
    position: absolute;
    top: .6rem;
    z-index: 3;
    padding: .2rem .7rem;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 600;
    color: #fff;
    backdrop-filter: blur(6px);
}
.proj-badge { inset-inline-start: .6rem; background: rgba(8, 12, 40, .55); border: 1px solid rgba(255, 255, 255, .2); }
.proj-soon  { inset-inline-end: .6rem; background: linear-gradient(135deg, #f59e0b, #ef4444); }

.project-card .slider-dots {
    position: absolute;
    inset-inline: 0;
    bottom: .55rem;
    z-index: 3;
    display: flex;
    justify-content: center;
    gap: .4rem;
}
.project-card .slider-dots .dot {
    width: 7px;
    height: 7px;
    padding: 0;
    margin: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, .55);
    box-shadow: none;
    transition: width .35s var(--ease), background .3s;
}
.project-card .slider-dots .dot:hover { background: #fff; transform: none; }
.project-card .slider-dots .dot.on { width: 20px; background: #fff; }
.project-card.is-disabled { opacity: .55; filter: grayscale(.7); }

/* ==================================================
   Experience Timeline
================================================== */
#experience-container {
    display: flex;
    flex-direction: column;
    gap: 2.2rem;
    max-width: 980px;
    position: relative;
    padding-block: 1rem;
}
#experience-container::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    transform: translateX(-50%);
    border-radius: 3px;
    background: linear-gradient(to bottom, transparent, var(--g1) 8%, var(--g2) 50%, var(--g3) 92%, transparent);
    opacity: .7;
}
#experience-container > .experience-card {
    width: calc(50% - 2.6rem);
    overflow: visible;
}
#experience-container > .experience-card:nth-child(odd)  { align-self: flex-start; --rx: -60px; }
#experience-container > .experience-card:nth-child(even) { align-self: flex-end;   --rx:  60px; }
body[dir="rtl"] #experience-container > .experience-card:nth-child(odd)  { --rx:  60px; }
body[dir="rtl"] #experience-container > .experience-card:nth-child(even) { --rx: -60px; }
.experience-icon {
    border-start-start-radius: inherit;
    border-end-start-radius: inherit;
}
.tl-node {
    position: absolute;
    top: 50%;
    width: 18px;
    height: 18px;
    margin-top: -9px;
    border-radius: 50%;
    background: var(--bg-color);
    border: 3px solid var(--g1);
    box-shadow: 0 0 0 5px rgba(96, 165, 250, .18), 0 0 14px var(--g1);
    z-index: 2;
}
.tl-node::after {   /* خط اتصال گره به کارت */
    content: "";
    position: absolute;
    top: 50%;
    height: 2px;
    width: calc(2.6rem - 9px);
    margin-top: -1px;
    background: var(--g1);
    opacity: .55;
}
.experience-card:hover .tl-node { background: var(--g1); animation: nodePulse 1.2s ease-out infinite; }
@keyframes nodePulse { 70% { box-shadow: 0 0 0 12px rgba(96, 165, 250, 0), 0 0 14px var(--g1); } }

/* Nodes on the side closer to the centerline */
#experience-container > .experience-card:nth-child(odd) .tl-node  { inset-inline-end: calc(-2.6rem - 9px); }
#experience-container > .experience-card:nth-child(even) .tl-node { inset-inline-start: calc(-2.6rem - 9px); }
#experience-container > .experience-card:nth-child(odd) .tl-node::after  { inset-inline-end: 18px; }
#experience-container > .experience-card:nth-child(even) .tl-node::after { inset-inline-start: 18px; }

.exp-period {
    display: inline-block;
    width: fit-content;
    margin: .2rem 0 .5rem;
    padding: .1rem .75rem;
    border-radius: 999px;
    font-size: .82rem;
    color: var(--accent-color);
    border: 1px solid currentColor;
    background: rgba(96, 165, 250, .08);
}
.exp-company { opacity: .85; }

@media (max-width: 768px) {
    #experience-container { padding-inline: 2.3rem 1rem; gap: 1.6rem; }
    #experience-container::before { left: auto; inset-inline-start: 1.15rem; transform: none; }
    #experience-container > .experience-card { width: 100%; align-self: stretch !important; }
    #experience-container > .experience-card .tl-node { inset-inline-end: auto !important; inset-inline-start: calc(-1.15rem - 9px) !important; }
    #experience-container > .experience-card .tl-node::after { inset-inline-end: auto !important; inset-inline-start: 18px !important; width: calc(1.15rem - 9px); }
    #experience-container > .experience-card { --rx: 0px !important; }
}

/* ---------- Site Version (Footer) ---------- */
.version-badge {
    padding: .15rem .75rem;
    border-radius: 999px;
    font-size: .8rem;
    font-weight: 600;
    direction: ltr;
    color: var(--accent-color);
    border: 1px solid currentColor;
    background: rgba(96, 165, 250, .1);
    transition: transform .25s, background .25s;
}
.version-badge:hover { transform: translateY(-2px); background: rgba(96, 165, 250, .22); text-decoration: none; }
.version-badge:empty { display: none; }
.footer-bottom { flex-wrap: wrap; gap: .6rem; }

/* ---------- Users who prefer to disable animations ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
    .reveal { opacity: 1; }
    html { scroll-behavior: auto; }
}